Concentric valve for compressor-pumps.



No. 758,183. PATENTED APR.26,1904.

' A. KRYSZAT.

GONCENTRIG VALVE FOR GOMPRESSOR PUMPS! APPLICATION FILED 001. 24, 1902.

NO MODEL.

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scribed and shown in the drawings.

Patented April 26, 1904.

PATENT Orricn.

.ALBERT KR YSZAT, OF BERLIN, GERMANY.

CONCENTRIC VALVE FOR COMPRESSOR-PUMPS.

SPECIFICATION forming part of Letters Patent No. 758,183, dated April 26, 1904.

Application filedOctober 24, 1 902.

To all whom it may concern:

Be it known that I, ALBERT KRYszAT, engineer, a subject of the German Emperor, and a resident of N o. 28 Levetzowstrasse, Berlin, in the Empire of Germany, have inventedcertain new and useful Improvements in Concentric Valves for Compressor-Pumps, of which the following is an exact, full, and clear description.

This invention relates to an improvement in. the valve arrangement of compressor-pumps; and its object is to provideadouble valve device comprising the features hereinafter de- While the principal feature consists in the combi nation of parts constituting the double-valve device, a second feature relates to the arrangement of by.pass jet-holes, whereby the issue of a small part of the compressed fluid is utilized for cooling the valve device. By these cooling means a portion of the compressed flnid is wasted so far as the volumetric eiiiciency siderably heated the said cooling action enables the compressor to be operated with greater velocity, and therefore the general efficiency is increased.

In the accompanyingdrawings, Figure l is a sectional view showing the end of the compressor cylinder with the valves mounted therein. Fig. 2 is a cross-section through the valve-neck on the line A B of Fig. 1, showing also the by-pass holes of a surrounding wall.

The compressor represented in the drawings is supposed to be an air-compressor.

In the drawings, cis a part of the cylinder having a head 03 secured thereto in a suitable manner, said head having a central opening 0 serving for the admission of air and in which the stems of the valves, with their operatingsprings, extend. The valve o is the inletvalve and the valve a the outlet-valve, and as the former is concentrically seated within the latter the stem .9 of the valve '0 loosely 'neck of the valve or.

fierial No. 128,626. (No model.)

extends through the bearing-eyes Z, formed in the interior of the sleeve-like stem g of the valve a.

A diaphragm p is fixed against the'inner side of the head d, which is provided with an annular chamber serving for a purpose to be explained later on, so that the diaphragm shuts off the admission-chamber adjoining the central opening 0 and fits tightly around the A collar 70, which screws onto the sleeve-like stem g, clamps the said diaphragm against the back of the valve a, and the outer rim of the diaphragmis fitted with a suitable packing 2, so as to form a tight joint. a chamber 2 adjacent to the valve-closed end of the cylinder 0 isformed and separated from the above-mentioned admission-chamber. The chamber r is connected to a tank or reservoir (not shown) by passage 0; and owing to its location behind the outlet-valve a receives the compressed fluid or air from the pump-cylinder, supplying same through the passage ato the reservoir. The outletvalve 16 is substantially of saucer shapeand is supported by the diaphragm p, the clasticity of which enables the valve a to move to and fro. Betweenthe neck of the valve u and the surrounding wall of the admission-chamher is provided ample play at y, thus permit- -ting a free valve movement advantageous to a proper seating. The periphery of the valve a has a seat-shoulder 2', adapted to close against the seat at the end of the cylinder'c and also a seat j, with which the inlet-valve v cooperates. The latter is of the mushroom type, and the stem 8 thereof, extending through the bearing-eyes Z Z, has ample play at m for enabling the free movement or self-adjustment of the valve. A spring 972, coiled around the sleeve-like stem g, tends to keep the valve a normally against its seat, and a spring a on the stem 8 of the valve t performs the same purpose for said vavle o. By this combination of parts and the valves being held loosely in their concentric position (owing to the play at m and g) each valve can move easily and in- By means of such diaphragm p r dependently and a perfect closure of the valves is insured even when the compressor-pump is operating very rapidly.

For preventing the valves from becoming unduly heated I have devised a special cooling arrangement of by-pass jet-holes which establish a communication between the chamber 9 and the admission-chamber of the compressor. This arrangement is based on the well-known principle that if a compressed fluid is made to expand when issuing at a jet-like orifice a cooling effect is thereby produced-z. a, the temperature of the fluid itself is reduced to a certain extent.

As already stated, the head d is provided with a chamber 7), which may be termed a. cooling-chamber. This chamber commu-i nicates with the passage a of the chamber 1 by means of a jet-like port 6, and its inner wall is provided with the by-pass jet-holesf, which are directed, with their. contracted openings, against the neck of the valve to near the collar 70. It may be understood that the space between the said collar and the above-mentioned inner wall forms part of the admissionchamber, from which the air (or fluid) is drawn into the compressor-cylinder through 9 and past the inlet-valve Q). The effect of the jetlike port 6, having a contracted orifice, and the by-pass jet-holes f is in the operation of the compressor-pump as follows: A portion of. the compressed air (or fluid) instead of being delivered ,with the remaining portion into-the supply-pipe of the reservoir passes through the port a into the cooling-chamber 5 and thence through the by-passjet-holes f into the admission-chamber. Thus during the operation of the pump a continuous rush of air or fluid in a by-pass takes place. The partial expansion. at the contracted orifice e, and especially the expansion at the by-pass jet-holes f, produces a distinctccooling effect which, on the onehand, lowers the temperature of the-cooling-chamber and its walls, and, on the other hand, reduces the temperature of the valves by the direct impinging action of the issuing expanding fluid as well as by the commingling (within the admission-chamber) of the cooled fluid with the fluid to be sucked in. It is admitted that the utilization of a. portion of the compressed air or fluid, according as it is drawn into and delivered from the compressor-cylinder without supplying the reservoir, detracts from the volumetric efliciency of the compressor; but by making the by-pass holes very small the loss diminished to a small percentage, so that the advantage of the cooling effect prevails.

I claim as my invention .1. In combination with a compressor-pump, a pair of valves arranged within the end of the pump-cylinder partly within the admissionchamber, a diaphragm supporting the outletvalve u. a sleeve connected to said valve having play (at 1 inside the surrounding wall of the admission-chamber, bearing-eyes in the sleeve, a stem 8 forming part of the inlet-valve '0, said stem extending through the said bearing-eyes and having play (at m) the valve 2} being seated concentrically within the valve 10.

2. In combination with a compressor-pum p, a pair of concentrically-seated valves arranged within the end of the pump-cylinder partly within the admission-chamber, a diaphragm supporting the outlet-valve u, a sleeve connected to said valve having play (at y) inside the surrounding wall of the admission-chamber, bearing-eyes in the sleeve, a stem 8 forming'part of the inlet-valve Q), said stem extending through the said bearing-eyes, by-pass jetholes arranged in the wall of the admissionchamber and opening toward the sleeve of the valve u, passages establishing communication between the said by-pass jet-holes and the chamber behind the outlet-valve for the purpose as set forth.

3. In combination with'a compressor-pump, apair of concentrically-seated valves arranged within the end of the pump-cylinder partly within the admission-chamber, a diaphragm supporting the outlet-valve u, a sleeve connected to said valve having play (at y) inside the surrounding wall of the admission-chamber, bearing eyes in the sleeve, a stem 8 forming part of the inlet-valvew, said stem extending through the said bearing-eyes, by-pass jetholes arranged, in the wall of the admissionchamber and opening toward the sleeve of the valve u, passages establishing communication between the said by-pass jet-holes and the chamber behind the outlet-valve, a port forming a part of such passages and leading into a cooling-chamber, the inner wall of which surrounds the admission chamber and is provided with the said by-pass jet-holes substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

, ALBERT KRYSZAT.

Witnesses:

WOLDEMAR I-IAUPT, HENRY HASPER. 

